/*
 * Copyright 2012-2014 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.jqd.examples.jpa2.lazy;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToMany;

/**
 * TODO
 * 
 * @author liaozhicheng.cn@gmail.com
 * @date 2013-3-4
 * @since 1.0
 */
@Entity
public class Teacher implements Serializable {
	
	private static final long serialVersionUID = 1047625591644617067L;
	
	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Integer id;
	
	private String name;
	
	@ManyToMany(mappedBy = "teachers", fetch = FetchType.LAZY)
	private Set<Class> classes = new HashSet<Class>();
	
	
	public Teacher() {
	}
	
	
	public Teacher(String name) {
		this.name = name;
	}
	
	
	public void addClass(Class e) {
		classes.add(e);
	}
	
	
	public Integer getId() {
		return id;
	}
	
	
	public void setId(Integer id) {
		this.id = id;
	}
	
	
	public String getName() {
		return name;
	}
	
	
	public void setName(String name) {
		this.name = name;
	}
	
	
	public Set<Class> getClasses() {
		return classes;
	}
	
	
	public void setClasses(Set<Class> classes) {
		this.classes = classes;
	}
	
	
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		return result;
	}
	
	
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Teacher other = (Teacher) obj;
		if (id == null) {
			if (other.id != null)
				return false;
		}
		else if (!id.equals(other.id))
			return false;
		return true;
	}
	
}
